Stand-boiler and water-heater.



B. F. FREYMARK.

STAND BOILER AND WATER HEATER.

APPLICATION FILED JULY 8,1914.

Patented Dec. 21, 1915.

a r 4 I" a A z 1% 3 I WW l fi M s NH ...L. u flmw mfi Am ""fl fl A K AW i fl u m i W W g I I fim M W WA Wu Z, w w fi wf .ing through a stuffing box 21 at the mid- "BRUNO F. FBEYIVIARK, OF ST. LOUIS, MISSOURI.

STAND-BOILER AND WATER-HEATER.

Specification of LettersPatent.

Patented Dec. 21, 1915.

Application filed. July 8, 1914. Serial No. 849,712.

To all whom it may concern:

Be it known that I, BRUNO F. F EYMARn, a citizen of the United States, and a resident of the city of St. Louis and State of Missouri, have invented a new and useful Improvement in Stand-Boilers and Water- Heaters, of which the following is a speci fication. I

This invention relates to combined water heaters and steam generators suitable for the use of bakers and others requiring steam intermittently.

The object of the invention is'a steam generator which will furnish dry steam, which can be heated up with great rapidity,and which can be repaired with facility.

Other objects of the invention appear in connection with the description of the apparatus shown in the accompanying drawing, and what the invention consists in is more particularly defined in the appended claims.

In the drawing, in which the several parts of the device are respectively designated by reference numerals, Figure 1 is a vertical sectional view of the device, and Fig. 2 is a plan View ofa heating coil. I

Referring to Fig. 1, my improved boiler consists of a shell 11 in the form of a seamless steel tube or pipe arranged with its axis vertical and having screw threads cut on its ends. A cast-iron cap 12 is screwed on the upper end of the shell and a flange 13 is screwed on its lower end. A. steel crown plate 14 is bolted to the flange 13, a suitable gasket being placed between the flange and the adjacent portion of the crown plate. The boiler shell is mounted on a stand comprising a cylindrical sheet-iron casing 15 supported on legs 16. The upper edge of the casing 15 is flanged outwardlyand bolted to the flange 13 and crown plate 14. The lower end of the casing 15 is open, and a gas burner 17 having a pipe connection 18 with a gas main is arranged in the opening. The casing 15 has an opening in its side wall, which is vclosed by a door 19, to give access to the burner and to the interior of the casing. The casing 15 constitutes a combustion chamber, and in order to provide means of escape for the burnt gases a flue 20 extends axially through the boiler, the lower end of the flue being expanded and beaded over into a hole in the middle of the crown plate 1-1, and the upper end of the flue extenddle of the cap 12. The stuffing box is providecl with packing 22, and has a screw cap 23 and follower 24; for confining the packing around the flue 20 whereby a steam-tight joint is maintained. The flue can move lengthwise through the stuffing box without leaking steam or water, whereby it may expand and contract independently of the boiler shell.

lVithin the casing 15 isarranged a series of heating coils 25 one above another. The heating coils are separate from each other. Each coil consists of a continuous pipe wound in the form of a flat spiral.v The ends'of the pipe are turned up, and each end is provided with a union or coupling 26. The outer end of each spiral is connected to one of a number of nipples 28 screwed into tapped holes in the crown plate 14. The inner end of each spiral is led outside of the spiral and is connected to the projecting lower end of one of a number of circulation pipes 29 which are screwed through the rects downward the steam or water issuing therefrom.

The boiler is provided with a feed water inlet pipe 31, a glass water gage 32, a steam or water pressure gage 33, a spring safety valve 34, and hot water and steam pipes 85, 36, all of usual construction. The boiler also has an air valve 37, which permits the passage of air from and into the boiler at the start and close of the steam generating process. The air valve 37 is of usual construction, and prevents the passage of water or steam through it when the pressure in the boiler is greater than the minimum pressure for which the air valve is set. The air valve The gas is turned on and the burner lighted,

whereupon the water in the coils is heated, and turned partly into steam. The steam passes through the ends of the coils, part going through the nipples 28 directly into the lower part of the boiler where it is con- The upper end of each circulation.

densed, and part going through thep'i'pes 29 into the upper part of the boiler. The steam going through the pipes 29 warms the water therein andtends to carry it along into the top of the boiler, thereby preventing it from returning to the coils. Water flows through the nipples 28 into the coils to replace that evaporated and discharged through the'pipes 29, thus setting up rapid circulation through keeping them from getting.

drawn off through the plug 38, or other suit-.

able means, until the boiler is about onethird full. The upper part of the boiler will be automatically filled with air as the water level falls. The gas, is turned on and the burner is lighted, thereby heating the coils and turning the water therein into steam.

The air alve keeps the pressurelow, pre- .vents violent fluctuations of pressure, and

I enables and promotes circulation of the water through the coils. The steam is genera'ted in the coils intermittently.

First it blows through the water in the nipples 28 and in the pipes 29 and out through their top ends, and forces. air out of the boiler i through the airvalve. The steam condenses in the cool boiler and as itvcondenses a vacuum is produced in the boiler, and the g I g I "hav ng-a cap screwed on one end and a flange screwed on its otherend, a' flat cirhot steam in the coilseXpands and continues to flow out of the coils until air rushing into the boiler through the air valve equalizes the pressure in the coils and in the boiler,

' i and forces water through the nipples: 28 into the coils.

is formed as before, and the cycle of opera Thereupon a quantity of steam tions is repeated After a number of repetitions, of the cycle of operations the Water in .the boiler and in the pipes 29 will be heated to such an extent that it will not condense the steam, and the waterin the pipes 29 will be gradually blown out ofthe upper ends of the pipes. When there is no longer any hydrostatic pressure on the ends of the coils attached to the pipes, water will flow con-1 tinuously'into the coils through the nipples 28, and rapid continuous generation of steam in the coils will ensue. The steam pressure has no efl'ect on the circulation of water through the coils after it is established being from the coils. will be superheated more or less, depending upon how hot the 'gas flame is-regulated to burn. The lower coils,

which are the nearest the flame, have agreater hydrostatic head upon them,v and consequently more water flowing through them, than the upper coils; and the size of the pip'e, length of the coil, and size of the burner areso chosen thatzthe coils all keep at about the -same temperature, whereby uneven heating and uneven deterioration of the coils is..overcome. "Moreover, the construction and arrangement of, the coils is such that one'or more may be'readily replaced when burnt'out without returning the boiler to the shop. Likewise, the crown plate 14 and flue 20 maybe removed and replaced'as aunit,'togetherwith all the coils, without returning the boiler to the shop,"and without requiring for theoperation; I

special tools or workmen- It is evidentthat modificationin the forms 7 and-arrangement of the parts of the device may be made without departing from the invention; and the invention "is not restricted f to the precise forms and arrangement shown.

l/Vhat Iclaim is l. A boiler consistin g of a seamless pipe having a cap screwed on oneend and a.

flange screwed on its other end, a flat crown *platedetachably secured to said flange, heat I ing coils detachably secured to. the under side ofsaid crown plate, and a combustion chamber detachably-1"secured v to the under side of said crown plate, said combustion chamberbeing clear of said heating coils and mounted onllegs for; supporting said]?- boiler. v I t p v I 2. A boiler consisting of a seamless pipe cular crown plate detachably secured to said flange, a central flue securedto the middle of said crown plate at one end and with its other endieXtendingthrou-gh said cap and 'slidably arranged with respect thereto, heating coils'detachably secured to the'under;

side ofsaid crown plate, anda combustion chamber detachably"secured tov the vunder side offisaid-crown plate, said combustion chamber being mounted on legs for support ing said boiler.

3. A boiler consisting. of a 'sea'mless' pipe having a cap screwed on one end and a i flange screwed on its other end, a flat crown 'tion between said flue andis'aid 'cap', a' plurality of heating coils withtheir ends detachably secured to the under side of .said

crown plate, and a combustion chamber surrounding said coils and detachably secured v 1 20 her being mounted on legs :Eor sup g .v T

to said crown plate, said combustion chamsaid boiler.

4. Acombined hot water heater andboiler I having an upright shell of considerableheight in proportion to its diameter, a fiat heating coil "horizontally arranged below said shell, one end of said heating coil having a. pipe connection with vthe lower portion of said shell and the other endof said coil being-connected to a pipe which opens into the upper portion of said shell, a water inlet valve, a water outlet from the lower portion of said shell, and an air valve connected to the upper portion of said boiler.

5. A combined hot water heater and boiler having an upright shell of considerable height in proportion to its diameter, a plurality of fiat heating coils horizontally arranged one over theoother below said shell, one end of each of said heating coils having a pipe connection with the lower portion of said shell and the other end of each of said coils being connected to a pipe which opens into the upper portion of said shell, a water inlet valve, 2. water outlet from the lower portion of said shell, and an air valve connected to the upper portion of said boiler.

6. An upright boiler having a crown sheet and a heating coil arranged below said crown sheet, said heating coil having one end connected to said crown sheet and the other'end Copies of this patent may be obtained for connected to a pipe which opens into the upper portion of said boiler, and a relief valve connected to the upper portion of said boiler and arranged to permit air to flow into and out of said boiler.

7. An upright boiler having a crown sheet and a plurality of heating coils arranged one over the other below said crown sheet,

each one of said heating coils having one end connected to said crown sheet and the other end connected to a pipe which opens into the upper portion of said boiler, and a relief valve connected to the upper portion of said boiler and arranged to permit air to flow into and out of said boiler.

Signed at St. Louis, Missouri, this 6th day of July, 1914.

BRUNO F. FREYMARK. Witnesses: I

A. M. HoLcoMBE, M. A. SHELTON.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

